This is not really much of a question as I can't expect you to remember; you've met so many fans over the years. However, this was certainly one of the most memorable moments of my young life!
I was only 13 and officially 4 foot 11 and 3/4 inches; at 6 foot 3 inches you towered over me. I had to wear a half-length scarf my mom knitted for me because a full-size one was too long! You were really concerned that I was so small and you told, "Eat more porridge!" Then someone in the crowd said something funny I don't remember and we both cracked up laughing (2nd picture). You can see from the pictures that there's never been a kid happier to meet his hero.
Anyway, I thought you might enjoy seeing the pictures, and that you'd be happy to learn that I eventually did get my growth spurt and now I'm six foot even! So thank you very much for your advice and for all you've done for Doctor Who over the years.